package ithema.Test;
public class Test3 {
    public static void main(String[] args) {
        //1.定义数组
        int []arr={1,2,3};
        //2.调用方法把数组变成字符串
        String str=arrayToString(arr);
        System.out.println(str);
    }
    public  static  String arrayToString(int[] arr){
        StringBuilder sb = new StringBuilder();
        sb.append("[");
        for(int i=0;i<arr.length;i++){
            if(i==arr.length-1){
                sb.append(arr[i]);
            }else{
                sb.append(arr[i]+", ");
            }
        }
        sb.append("]");
        return sb.toString();
    }

}
